$.has(‘selecor’)和$.filter(‘selector’)方法有什么区别,哪个更好.
因为它们都执行相同的操作.
因为它们都执行相同的操作.
解决方法
它们实际上是完全不同的.
filter对匹配的元素进行操作：
Reduce the set of matched elements to those that match the selector or pass the function’s test.
has过滤器基于匹配元素的后代：
Reduce the set of matched elements to those that have a descendant that matches the selector or DOM element.
实际例子：
<span class="outer">outer span</span>
<div class="outer">
outer div<br>
<span>descendant span</span>
</div>
$('.outer').filter('span'); //returns the outer span
$('.outer').has('span'); //returns the outer div
